Abstract
Electrical energy is mostly converted from thermal energy drown from the thermal or nuclear power plant for large scale and Diesel generator (DG) sets are used as a backup device. In these, we mostly used water as a working substance and cooling agent for maintaining the operating temperature of the devices. Experimental and theoretical evaluation of three identical reduced scales long still prototypes covered with the different metallic sheets (viz. GI, Cu, and Al) are reported in this manuscript. Hot wastewater at 70±1 ºC is fed to the distiller unit as a discharge of the thermal unit is ranges between 65 to 75 ºC. The theoretical result obtained from the regression analysis gives good agreement with the result obtained from the experimentation. Long still covered with the Cu sheet material is gives better performance as compared with the others (viz. 55.03 and 34.69% higher than the GI and Al sheet cover). It has been observed that the still covered with the Cu sheet gives better distillate yield as compared with the still covered with the Al or GI sheet material.
Highlights
The demand for potable water is increasing day by day due to the depletion of potable water mainly due to the rapid enhancement in the population and industrialization
▪ 933 on Cu condensing sheet cover has maintained its lead throughout the length of still in comparison with the other two stills, whereas, it goes on reducing throughout the length of the long stills
Long still which covered with the Cu sheet material shows higher pressure difference as compared to the other two identical long distiller units
Summary
The demand for potable water is increasing day by day due to the depletion of potable water mainly due to the rapid enhancement in the population and industrialization. Mishra et al [2] have reported experimental evaluation of long still covered with the glass material for utilization of hot wastewater will pave the way for utilization of this waste energy. Sharma et al [3] have reported the effect of different flow rates on the performance of long still covered with the GI sheet. Dumka and Mishra [6,7] have reported Experimental and theoretical evaluation and the way for utilization of ground energy for the desalination using single slope solar still. Different geometry new absorber configuration (flat, grooved, and fin-shaped absorbers) of single basin solar still for partial utilization of hot wastewater has tested and reported by Hansen and Murugavel [15]
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